/**
 * 多模态AI API路由
 * 处理图像识别、语音处理、图像生成和智能对话等功能
 */

import { Router, Request, Response } from 'express';
import multer from 'multer';
import { v4 as uuidv4 } from 'uuid';
import path from 'path';
import fs from 'fs';

const router = Router();

// 配置multer用于文件上传
const storage = multer.memoryStorage();
const upload = multer({ 
  storage,
  limits: {
    fileSize: 10 * 1024 * 1024 // 10MB限制
  },
  fileFilter: (req, file, cb) => {
    // 允许的文件类型
    const allowedTypes = {
      image: ['image/jpeg', 'image/png', 'image/gif', 'image/webp'],
      audio: ['audio/mpeg', 'audio/wav', 'audio/ogg', 'audio/m4a']
    };
    
    const isImage = allowedTypes.image.includes(file.mimetype);
    const isAudio = allowedTypes.audio.includes(file.mimetype);
    
    if (isImage || isAudio) {
      cb(null, true);
    } else {
      cb(new Error('不支持的文件类型'));
    }
  }
});

// 模拟AI服务状态
let serviceStatus = {
  image_recognition: true,
  speech_processing: true,
  image_generation: true,
  intelligent_chat: true,
  nlp_services: true
};

// 模拟使用统计
let usageStats = {
  daily_requests: 0,
  monthly_requests: 0,
  remaining_quota: 10000
};

/**
 * POST /api/ai/image/recognize
 * 图像识别 - 识别图片中的物体、场景、文字等
 */
router.post('/image/recognize', upload.single('image'), async (req: Request, res: Response) => {
  try {
    const { image_url } = req.body;
    const imageFile = req.file;
    
    if (!image_url && !imageFile) {
      return res.status(400).json({
        success: false,
        error: '请提供图片文件或图片URL'
      });
    }
    
    // 模拟图像识别结果
    const recognitionResult = {
      objects: [
        {
          name: '奶瓶',
          confidence: 0.95,
          bbox: [100, 150, 200, 300],
          category: '母婴用品'
        },
        {
          name: '婴儿',
          confidence: 0.88,
          bbox: [50, 80, 400, 500],
          category: '人物'
        }
      ],
      scene: {
        description: '温馨的育儿场景',
        confidence: 0.92,
        tags: ['家庭', '育儿', '温馨', '母婴']
      },
      text: [
        {
          text: '优质奶粉',
          confidence: 0.87,
          bbox: [200, 50, 150, 30]
        }
      ],
      faces: [
        {
          age_range: [0, 2],
          gender: '未知',
          emotion: '开心',
          confidence: 0.85,
          bbox: [150, 100, 100, 120]
        }
      ]
    };
    
    // 更新使用统计
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: recognitionResult
    });
  } catch (error: any) {
    console.error('图像识别失败:', error);
    res.status(500).json({
      success: false,
      error: '图像识别服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/image/recognize-product
 * 产品识别 - 专门识别母婴产品
 */
router.post('/image/recognize-product', upload.single('image'), async (req: Request, res: Response) => {
  try {
    const { image_url } = req.body;
    const imageFile = req.file;
    
    if (!image_url && !imageFile) {
      return res.status(400).json({
        success: false,
        error: '请提供图片文件或图片URL'
      });
    }
    
    // 模拟产品识别结果
    const productResult = {
      product_name: '贝亲宽口径玻璃奶瓶',
      category: '奶瓶',
      brand: '贝亲',
      confidence: 0.93,
      similar_products: [
        {
          name: '新安怡自然原生玻璃奶瓶',
          price_range: '¥89-¥129',
          rating: 4.8,
          image_url: 'https://example.com/product1.jpg'
        },
        {
          name: 'NUK宽口径玻璃奶瓶',
          price_range: '¥78-¥108',
          rating: 4.6,
          image_url: 'https://example.com/product2.jpg'
        }
      ],
      safety_info: {
        age_appropriate: '0-12个月',
        safety_rating: 5,
        warnings: ['使用前请检查奶瓶是否有裂纹', '请使用温水清洗']
      }
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: productResult
    });
  } catch (error: any) {
    console.error('产品识别失败:', error);
    res.status(500).json({
      success: false,
      error: '产品识别服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/image/recognize-symptoms
 * 症状识别 - 识别宝宝症状相关图片
 */
router.post('/image/recognize-symptoms', upload.single('image'), async (req: Request, res: Response) => {
  try {
    const { image_url } = req.body;
    const imageFile = req.file;
    
    if (!image_url && !imageFile) {
      return res.status(400).json({
        success: false,
        error: '请提供图片文件或图片URL'
      });
    }
    
    // 模拟症状识别结果
    const symptomsResult = {
      possible_conditions: [
        {
          name: '轻微湿疹',
          confidence: 0.78,
          severity: 'mild' as const,
          description: '皮肤出现轻微红疹，可能是接触性皮炎或湿疹',
          recommendations: [
            '保持皮肤清洁干燥',
            '使用温和的婴儿护肤品',
            '避免过度摩擦',
            '如症状持续或加重请咨询医生'
          ]
        }
      ],
      urgent_care_needed: false,
      disclaimer: '此结果仅供参考，不能替代专业医疗诊断。如有疑虑请及时咨询医生。'
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: symptomsResult
    });
  } catch (error: any) {
    console.error('症状识别失败:', error);
    res.status(500).json({
      success: false,
      error: '症状识别服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/speech/to-text
 * 语音转文字
 */
router.post('/speech/to-text', upload.single('audio'), async (req: Request, res: Response) => {
  try {
    const { language = 'zh-CN' } = req.body;
    const audioFile = req.file;
    
    if (!audioFile) {
      return res.status(400).json({
        success: false,
        error: '请提供音频文件'
      });
    }
    
    // 模拟语音识别结果
    const speechResult = {
      transcript: '宝宝今天有点咳嗽，需要注意什么吗？',
      confidence: 0.92,
      language: language,
      duration: 3.5,
      segments: [
        {
          text: '宝宝今天有点咳嗽',
          start_time: 0.0,
          end_time: 1.8,
          confidence: 0.95
        },
        {
          text: '需要注意什么吗',
          start_time: 1.8,
          end_time: 3.5,
          confidence: 0.89
        }
      ]
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: speechResult
    });
  } catch (error: any) {
    console.error('语音转文字失败:', error);
    res.status(500).json({
      success: false,
      error: '语音识别服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/speech/from-text
 * 文字转语音
 */
router.post('/speech/from-text', async (req: Request, res: Response) => {
  try {
    const { text, voice = 'female', speed = 1.0, pitch = 1.0, language = 'zh-CN' } = req.body;
    
    if (!text) {
      return res.status(400).json({
        success: false,
        error: '请提供要转换的文字'
      });
    }
    
    // 模拟语音合成结果
    const ttsResult = {
      audio_url: `https://example.com/audio/${uuidv4()}.mp3`,
      duration: Math.ceil(text.length * 0.1), // 估算时长
      format: 'mp3'
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: ttsResult
    });
  } catch (error: any) {
    console.error('文字转语音失败:', error);
    res.status(500).json({
      success: false,
      error: '语音合成服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/speech/real-time
 * 实时语音处理
 */
router.post('/speech/real-time', upload.single('audio'), async (req: Request, res: Response) => {
  try {
    const audioFile = req.file;
    
    if (!audioFile) {
      return res.status(400).json({
        success: false,
        error: '请提供音频数据'
      });
    }
    
    // 模拟实时语音处理结果
    const realtimeResult = {
      is_speech: true,
      transcript: '妈妈，我饿了',
      confidence: 0.87,
      intent: 'request_food'
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: realtimeResult
    });
  } catch (error: any) {
    console.error('实时语音处理失败:', error);
    res.status(500).json({
      success: false,
      error: '实时语音处理服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/image/generate
 * AI图像生成
 */
router.post('/image/generate', async (req: Request, res: Response) => {
  try {
    const { prompt, style = 'realistic', size = 'square', quality = 'standard', count = 1 } = req.body;
    
    if (!prompt) {
      return res.status(400).json({
        success: false,
        error: '请提供图像生成提示词'
      });
    }
    
    // 模拟图像生成结果
    const images = [];
    for (let i = 0; i < count; i++) {
      images.push({
        url: `https://example.com/generated/${uuidv4()}.jpg`,
        width: size === 'portrait' ? 768 : size === 'landscape' ? 1024 : 512,
        height: size === 'portrait' ? 1024 : size === 'landscape' ? 768 : 512,
        format: 'jpeg'
      });
    }
    
    const generateResult = {
      images,
      prompt_used: prompt,
      generation_time: 2.5
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: generateResult
    });
  } catch (error: any) {
    console.error('图像生成失败:', error);
    res.status(500).json({
      success: false,
      error: '图像生成服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/image/edit
 * 图像编辑
 */
router.post('/image/edit', upload.single('image'), async (req: Request, res: Response) => {
  try {
    const { edit_prompt } = req.body;
    const imageFile = req.file;
    
    if (!imageFile || !edit_prompt) {
      return res.status(400).json({
        success: false,
        error: '请提供图片文件和编辑指令'
      });
    }
    
    // 模拟图像编辑结果
    const editResult = {
      edited_image_url: `https://example.com/edited/${uuidv4()}.jpg`,
      original_image_url: `https://example.com/original/${uuidv4()}.jpg`,
      edit_description: `已根据指令"${edit_prompt}"完成图像编辑`
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: editResult
    });
  } catch (error: any) {
    console.error('图像编辑失败:', error);
    res.status(500).json({
      success: false,
      error: '图像编辑服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/chat/intelligent
 * 智能对话 - 多轮对话上下文理解
 */
router.post('/chat/intelligent', async (req: Request, res: Response) => {
  try {
    const { context, message } = req.body;
    
    if (!message) {
      return res.status(400).json({
        success: false,
        error: '请提供对话消息'
      });
    }
    
    // 模拟智能回复结果
    const chatResult = {
      reply: '根据您的描述，宝宝可能是因为长牙期不适导致的哭闹。建议您可以给宝宝准备一些磨牙棒，或者用干净的手指轻轻按摩宝宝的牙龈。如果症状持续，建议咨询儿科医生。',
      confidence: 0.89,
      intent: 'parenting_advice',
      entities: [
        {
          type: 'age',
          value: '6个月',
          confidence: 0.92
        },
        {
          type: 'symptom',
          value: '哭闹',
          confidence: 0.95
        },
        {
          type: 'condition',
          value: '长牙',
          confidence: 0.87
        }
      ],
      suggestions: [
        '了解更多长牙期护理知识',
        '查看磨牙棒推荐',
        '预约儿科医生咨询'
      ],
      follow_up_questions: [
        '宝宝还有其他不适症状吗？',
        '宝宝的睡眠情况如何？',
        '需要推荐一些适合的磨牙产品吗？'
      ]
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: chatResult
    });
  } catch (error: any) {
    console.error('智能对话失败:', error);
    res.status(500).json({
      success: false,
      error: '智能对话服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/nlp/intent
 * 意图识别
 */
router.post('/nlp/intent', async (req: Request, res: Response) => {
  try {
    const { message, context } = req.body;
    
    if (!message) {
      return res.status(400).json({
        success: false,
        error: '请提供要分析的消息'
      });
    }
    
    // 模拟意图识别结果
    const intentResult = {
      intent: 'product_inquiry',
      confidence: 0.91,
      entities: [
        {
          type: 'product_category',
          value: '奶粉',
          confidence: 0.94
        },
        {
          type: 'age_group',
          value: '0-6个月',
          confidence: 0.88
        }
      ],
      suggested_actions: [
        'show_product_recommendations',
        'provide_feeding_guide',
        'schedule_consultation'
      ]
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: intentResult
    });
  } catch (error: any) {
    console.error('意图识别失败:', error);
    res.status(500).json({
      success: false,
      error: '意图识别服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/nlp/sentiment
 * 情感分析
 */
router.post('/nlp/sentiment', async (req: Request, res: Response) => {
  try {
    const { text } = req.body;
    
    if (!text) {
      return res.status(400).json({
        success: false,
        error: '请提供要分析的文本'
      });
    }
    
    // 模拟情感分析结果
    const sentimentResult = {
      sentiment: 'positive' as const,
      confidence: 0.86,
      emotions: [
        {
          emotion: '开心',
          intensity: 0.8
        },
        {
          emotion: '满意',
          intensity: 0.7
        },
        {
          emotion: '感激',
          intensity: 0.6
        }
      ]
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: sentimentResult
    });
  } catch (error: any) {
    console.error('情感分析失败:', error);
    res.status(500).json({
      success: false,
      error: '情感分析服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/nlp/summarize
 * 内容摘要生成
 */
router.post('/nlp/summarize', async (req: Request, res: Response) => {
  try {
    const { content, max_length = 200 } = req.body;
    
    if (!content) {
      return res.status(400).json({
        success: false,
        error: '请提供要摘要的内容'
      });
    }
    
    // 模拟摘要生成结果
    const summaryResult = {
      summary: '本文介绍了新生儿护理的基本要点，包括喂养、睡眠、清洁和健康监护等方面的重要知识，为新手父母提供了实用的指导建议。',
      key_points: [
        '新生儿喂养频率和方法',
        '安全睡眠环境的建立',
        '日常清洁护理步骤',
        '健康状况监测要点'
      ],
      original_length: content.length,
      summary_length: 65
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: summaryResult
    });
  } catch (error: any) {
    console.error('内容摘要生成失败:', error);
    res.status(500).json({
      success: false,
      error: '内容摘要服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/multimodal/analyze
 * 多模态内容分析
 */
router.post('/multimodal/analyze', upload.fields([
  { name: 'audio', maxCount: 1 },
  { name: 'image_0', maxCount: 1 },
  { name: 'image_1', maxCount: 1 },
  { name: 'image_2', maxCount: 1 }
]), async (req: Request, res: Response) => {
  try {
    const { text } = req.body;
    const files = req.files as { [fieldname: string]: Express.Multer.File[] };
    
    if (!text && !files) {
      return res.status(400).json({
        success: false,
        error: '请提供要分析的内容'
      });
    }
    
    // 模拟多模态分析结果
    const analysisResult = {
      overall_sentiment: 'positive',
      key_topics: ['育儿经验', '产品推荐', '健康护理'],
      content_type: 'educational',
      recommendations: [
        '内容质量很高，建议分享给更多父母',
        '可以制作成系列内容',
        '适合在社交媒体平台推广'
      ],
      safety_check: {
        is_safe: true,
        concerns: []
      }
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: analysisResult
    });
  } catch (error: any) {
    console.error('多模态内容分析失败:', error);
    res.status(500).json({
      success: false,
      error: '多模态分析服务暂时不可用'
    });
  }
});

/**
 * POST /api/ai/content/generate
 * 个性化内容生成
 */
router.post('/content/generate', async (req: Request, res: Response) => {
  try {
    const { user_profile, content_type, topic, tone, length } = req.body;
    
    if (!content_type || !topic) {
      return res.status(400).json({
        success: false,
        error: '请提供内容类型和主题'
      });
    }
    
    // 模拟个性化内容生成结果
    const contentResult = {
      content: `# ${topic}\n\n作为新手父母，了解${topic}是非常重要的。本文将为您详细介绍相关知识和实用建议...\n\n## 主要要点\n\n1. 基础知识介绍\n2. 实用操作指南\n3. 常见问题解答\n4. 专家建议\n\n希望这些信息对您有所帮助！`,
      title: `新手父母必读：${topic}完全指南`,
      tags: ['育儿', '新手父母', topic, '指南'],
      estimated_reading_time: 5,
      seo_keywords: [topic, '育儿知识', '新手父母', '婴儿护理']
    };
    
    usageStats.daily_requests++;
    usageStats.monthly_requests++;
    usageStats.remaining_quota--;
    
    res.json({
      success: true,
      data: contentResult
    });
  } catch (error: any) {
    console.error('个性化内容生成失败:', error);
    res.status(500).json({
      success: false,
      error: '内容生成服务暂时不可用'
    });
  }
});

/**
 * GET /api/ai/status
 * 获取AI服务状态
 */
router.get('/status', async (req: Request, res: Response) => {
  try {
    const statusResult = {
      services: serviceStatus,
      response_times: {
        image_recognition: 1.2,
        speech_processing: 0.8,
        image_generation: 3.5,
        intelligent_chat: 0.6,
        nlp_services: 0.4
      },
      usage_stats: usageStats
    };
    
    res.json({
      success: true,
      data: statusResult
    });
  } catch (error: any) {
    console.error('获取AI服务状态失败:', error);
    res.status(500).json({
      success: false,
      error: '无法获取服务状态'
    });
  }
});

/**
 * POST /api/ai/services/toggle
 * 切换服务状态（管理员功能）
 */
router.post('/services/toggle', async (req: Request, res: Response) => {
  try {
    const { service, enabled } = req.body;
    
    if (!service || typeof enabled !== 'boolean') {
      return res.status(400).json({
        success: false,
        error: '请提供服务名称和状态'
      });
    }
    
    if (serviceStatus.hasOwnProperty(service)) {
      serviceStatus[service as keyof typeof serviceStatus] = enabled;
      
      res.json({
        success: true,
        data: {
          service,
          enabled,
          message: `服务 ${service} 已${enabled ? '启用' : '禁用'}`
        }
      });
    } else {
      res.status(400).json({
        success: false,
        error: '未知的服务名称'
      });
    }
  } catch (error: any) {
    console.error('切换服务状态失败:', error);
    res.status(500).json({
      success: false,
      error: '切换服务状态失败'
    });
  }
});

export default router;